Mold-jig.



P. J. HAAS.

MOLD JIG.

APPLIOATION FILED 00117. 1910.

Patented Aug. 8, 1911.

PHILIP J. HAAS, OF Y ORK, NEBRASKA. I

MOLD-JIG.

Specification of Letters Patent.

Patented Aug. 8, 1911.

Application filed October 17, 1910., Serial No. 587,567.

1 0 all whom 'it may concem:

Be it known that I, PHILIP J. Haas, citizen of the United States, residing at York, in the county of York and State of Nebraska, have invented certain new and useful Improvements in Mold-Jigs, of which the following is a specification.

This invention comprehends certain new and useful improvements in appliances for making reinforced concrete fence posts and other molded articles or structures, the present invention having for its primary object a very simple, durable and efficient construction of mold jig or shaking device, by the use of which the plastic or soft material in the mold will be caused to settle down firmly andj solidly, the air being also extracted from the ingredient-s so as to make a firm product withv no air holes and which will be more desirable in every way.-

WVith this and other objects in view as.

will more fully appear as the description proceeds, the invention consists in certain constructions, arrangements and combinations of the parts that I shall hereinafter fully describe and claim.

For a full understanding of the invention, reference is to be had to the following description and accompanying drawings, in which:

Figure 1 is a. perspective view of my invention; Fig. 2 is an end view thereof; Fig. 3 is a perspective view of one of the jigging devices; and, Fig. 4 is an enlarged fragmentary longitudinal section.

Corresponding and like-parts are referred to in the following description and indicated in all the views of the drawings by the same reference characters.

Referring to the drawing, the numeral 1 designates a mold designed particularly for use i. forming reinforced concrete fence posts, the mold box having secured to the lower face of its base, near the ends thereof, two transversely extending preferably me tallic bars 2 that are forked at their ends, as indicated at 3, the forked extremities projecting slightly beyond the sides of the mold box, as clearly illustrated in the drawings.

The forked ends 3 of the bars 2 are designed to straddle or embrace the side edges of the up turned ends 4 of preferably metallic strips or plates 5 that are secured to wooden horses 6, as shown, each plate 5 being provided, preferably near its ends, with upwardly projecting hollow bumpers 7. Bolts 8 pass downwardly through the hollow bumpers 7 and also through the plate 5 and the projecting ends of the horse 6, whereby to secure the plate to the horse. As an additional means of attachment, I may aperture the plates at the middle thereof, as shown, and use a bolt at this point also.

The bumpers 7 are encircled by helical springs 9 which in their uncompressed or normal condition, project above the bump-' ers to some extent, their upper ends preferably terminating short of the upper extremities of the lip-turned ends 4: of the plates. i

From the foregoing description in connection with the accompanying drawing, the operation of my improved mold jig will be apparent.

In thev practical use of the device, the mold box, equipped with the bars 2,- is supported on horses equipped with the other parts of my invention, the forked ends 3 engaging the side edges of the upturned ends at of the plates 5 so as to properly hold the mold box in place and guide it in itsv movements, the box being supported directly upon the upper ends of the springs 9. To operate the machine, it is only necessary for the attendant to take hold of one end of the same and vibrate it up and down, the mold striking the bumpers and thus producing a series of sudden shocks and jars which brings about the desired effect. The mold can be easily applied to and detached from the jigging device so that the latter will notinterfere in any wise with the operation of pouring in the plastic substance or of separating the parts to remove the completed article, and it is obvious that the devices may be very cheaply manufacured and that they will last a considerable time. 4

Having thus described the invention, what is claimed as new is:

1. An apparatus for the purpose described, comprising independent supports, plates secured to therespective supports and formed with upturned ends, bumpers.pro-.

jecting upwardly from the plates and secured thereto, springs encircling said bump ers and normally projecting above the same,

a mold box adapted to rest loosely on said.

springs, and transversely extending guide bars secured to the bottom of'the mold box and formed with forked ends embracing the side edges of the upturned ends of the plates.

2. An apparatus for the purpose described, including a support, a plate mounted on said support and provided with uptogether,

turned ends, bumpers mounted on and projecting upwardly from said plate, bolts guide bar secured to the bottom of the mold box and extending'transversely thereof, the ends of said bar having a movable guiding connection with the upturned ends of the 15 plate. In testimony whereof, I afiix mysignature in presence of two witnesses.

PHILIP J. HAAS. [Ls] Witnesses:

M. M. WILDMAN, D. W. HoYT. 

